Q4006R4

Triacs Overview

The Littelfuse Q4006R4 is a bidirectional triac designed for AC power control applications. It features a rated repetitive off-state voltage (VDRM) of 400 V and an on-state RMS current (It RMS) of 6 A. The device operates within a temperature range of -40 °C to +125 °C. Key electrical parameters include a maximum holding current of 50 mA, a gate trigger voltage of 2.5 V, and a gate trigger current of 25 mA. It exhibits a typical on-state voltage of 1.6 V and a non-repetitive peak on-state current capability of 65 A or 80 A depending on the pulse width. Leakage current at VDRM is specified at 50 uA.

Triacs Feature Summary

• Bidirectional switching capability for alternating current circuits
• High thermal stability with operation up to 125 °C
• Robust surge handling with high non-repetitive peak current ratings

Triacs Applications

• AC motor speed control systems
• Solid-state relay implementations
• Lighting dimmer circuits

Triacs Procurement Notes

Verify the specific suffix 'R4' against official Littelfuse documentation to confirm package type and tape/reel specifications. Ensure compatibility with existing PCB footprints, as surface mount variants require precise soldering profiles. Cross-reference datasheet revisions to confirm compliance with current RoHS and REACH standards before finalizing procurement orders.

Triacs Selection Notes

Select this component when a 400 V blocking voltage and 6 A continuous current rating are required in a compact form factor. Consider the 25 mA gate trigger requirement for driver circuit design. Evaluate thermal management needs given the 125 °C junction temperature limit. Compare leakage current specifications against sensitive load requirements to ensure reliable turn-off performance.

Triacs Part Context

This part belongs to the Littelfuse Qxx06xx series of general-purpose triacs. These devices are engineered for cost-effective AC power switching in consumer and industrial electronics. The series offers a balance of current handling and voltage blocking capabilities suitable for standard mains frequency applications.

Triacs Replacement Considerations

Consult official Littelfuse substitution guides for verified equivalents. Generic replacements must match the 400 V rating, 6 A current capacity, and TO-252 or similar SMD package dimensions. Verify gate sensitivity and holding current parameters to ensure functional interchangeability.